CS44600
CHXX_CORS[5:0]
000000
000001
001010
011001
100000
101000
Coarse Filter Setting
0 dB
-0.1 dB
-1.0 dB
-2.5 dB
-3.2 dB
-4.0 dB
Table 12. Channel Load Compensation Filter Coarse Adjust
7.19
Chnl XX Load Compensation Filter - Fine Adjust
(addresses 19h, 1Bh, 1Dh, 1Fh, 21h, 23h)
6
RESERVED
5
CHXX_FINE5
4
CHXX_FINE4
3
CHXX_FINE3
2
CHXX_FINE2
1
CHXX_FINE1
0
CHXX_FINE0
7
RESERVED
7.19.1 Channel Compensation Filter - Fine Adjust (CHXX_FINE[5:0])
Default = 000000
Function:
The Channel Load Compensation Filter Fine Adjustment settings control the amount of attenuation of this
single-pole filter which follows the Coarse Adjustment Compensation Filter. These bits are used in con-
junction with the Coarse Adjustment bits to fine tune the total frequency response of the system to com-
pensate for speaker impedance load variations. Each PWM channel is controlled by an associated
register. The fine adjustment bits will attenuate the audio response curve according to the table below in
0.1 dB increments. Filter setting values less than -4.0 dB will cause the PWM output to mute.
CHXX_FINE[5:0]
000000
000001
001010
011001
100000
101000
Fine Filter Setting
0 dB
-0.1 dB
-1.0 dB
-2.5 dB
-3.2 dB
-4.0 dB
Table 13. Channel Load Compensation Filter Fine Adjust
7.20
Interrupt Mode Control (address 28h)
6
INT0
5
RESERVED
4
RESERVED
3
RESERVED
2
RESERVED
1
RESERVED
0
OVFL_L/E
7
INT1
7.20.1 Interrupt Pin Control (INT1/INT0)
Default = 00
00 - Active high, high output indicates interrupt condition has occurred
01 - Active low, low output indicates an interrupt condition has occurred
10 - Open drain, active low. Requires an external pull-up resistor on the INT pin.
11 - Reserved
Function:
Determines how the interrupt pin (INT) will indicate an interrupt condition. If any of the mask bits in the
Interrupt Mask Register are set to a 1b, read the Interrupt Status Register to determine which condition
caused the interrupt.
DS633F1
61
CIRRUS [ CIRRUS LOGIC ]
